Tsum1pfr-lf Datasheet

This article synthesizes a for the Tsum1pfr-lf, based on industry-standard naming conventions and common application scenarios. Use this as a reference framework when sourcing or testing this component. Part Number Breakdown: Decoding "Tsum1pfr-lf" Before diving into electrical characteristics, let’s parse the nomenclature:

| Part Number | Package | Lead-Free | Marking | Reel Quantity | | :--- | :--- | :--- | :--- | :--- | | Tsum1pfr-lf-S | SOT-223 | Yes (LF) | 1PFR | 2,500 | | Tsum1pfr-lf-8 | SOIC-8 | Yes (LF) | T1L | 4,000 | Tsum1pfr-lf Datasheet

| Pin No. | Name | Description | | :--- | :--- | :--- | | 1 | VCC | Supply voltage (12V typical, 20V max) | | 2 | GND | Ground reference | | 3 | FB | Feedback input from output voltage divider | | 4 | COMP | Compensation pin for loop stability | | 5 | CS | Current sense input (external resistor to GND) | | 6 | OUT | Gate drive output for external MOSFET | This article synthesizes a for the Tsum1pfr-lf, based

If you have specific measurements or an actual sample of Tsum1pfr-lf, consider performing curve-tracing, pin continuity tests, and functional validation on a breadboard before full production. Disclaimer: This article is for educational and reference purposes. The Tsum1pfr-lf is not an active product from any major semiconductor house as of 2026. Verify all details with the original component supplier. | Name | Description | | :--- |

If the Tsum1pfr-lf includes an internal MOSFET, Pin 6 becomes the Drain/Switch node. Absolute Maximum Ratings | Parameter | Symbol | Min | Max | Unit | | :--- | :--- | :--- | :--- | :--- | | VCC Supply Voltage | VCC | -0.3 | 22 | V | | FB, COMP, CS Pin Voltage | - | -0.3 | VCC+0.3 | V | | OUT Pin Voltage (internal driver) | VOUT | -0.3 | VCC | V | | Junction Temperature | Tj | -40 | 150 | °C | | Storage Temperature | Tstg | -65 | 150 | °C | | Lead Temperature (soldering, 10s) | - | - | 260 | °C |

Exceeding these ratings will cause permanent damage. LF suffix confirms lead-free soldering compatible (peak 260°C). Electrical Characteristics (Typical at VCC=12V, TA=25°C) | Parameter | Condition | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | Supply Current (startup) | Before switching | - | 50 | 100 | µA | | Supply Current (operating) | fsw=65kHz, no load | 1.5 | 2.5 | 3.5 | mA | | UVLO Turn-On Threshold | VCC rising | 10.5 | 11.2 | 11.8 | V | | UVLO Hysteresis | - | - | 1.5 | - | V | | Reference Voltage (FB) | TA=25°C | 2.475 | 2.500 | 2.525 | V | | Oscillator Frequency | RT=100kΩ to GND | 50 | 65 | 80 | kHz | | Maximum Duty Cycle | - | 85 | 92 | 95 | % | | CS Trip Voltage | Overcurrent limit | 0.48 | 0.50 | 0.52 | V | | Output Rise Time | CLOAD=1nF | - | 40 | 80 | ns |